Programable filter using chirp-Z transform
US4049958A · kind A · utility
18Cited by
7References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 3, 1975 |
| Grant date | Sep 20, 1977 |
| Priority date | — |
| Expiry date | Mar 3, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06G7/195
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A transform structure employing surface wave devices performs Fourier transform operations on a time-limited substantially band limited signal. The output signal of the transform structure is related to the Fourier transform of the input signal in a manner which permits forming the product of this output with a similar output of a second transform structure. This product is inverted by a third transform structure so as to provide the convolution of the two original input functions. The overall structure comprises a filter apparatus readily programable in either the time or frequency domain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.